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Correlation of fetal blood vessel Doppler measurements with fetal anemia among Rhesus isoimmunized pregnancies after two intrauterine transfusions
Author(s) -
Kumari Sarita,
Deka Dipika,
Dadhwal Vatsla,
Perumal Vanamail
Publication year - 2019
Publication title -
international journal of gynecology and obstetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 97
eISSN - 1879-3479
pISSN - 0020-7292
DOI - 10.1002/ijgo.12825
Subject(s) - medicine , hematocrit , confidence interval , obstetrics , fetus , middle cerebral artery , anemia , descending aorta , cardiology , pregnancy , aorta , genetics , ischemia , biology
Objective To assess the correlation between fetal blood vessel Doppler measurements and fetal anemia among Rhesus isoimmunized pregnancies after two intrauterine transfusions as a potential guide to therapy. Methods A prospective observational study was conducted among 30 women who attended a single hospital in India between April 2, 2015 and October 30, 2016. The participants underwent a third intrauterine transfusion based on a middle cerebral artery ( MCA ) peak systolic velocity ( PSV ) of greater than 1.50 multiples of the median (MoM). Cordocentesis was performed before the third intrauterine transfusion and hematocrit values correlated with the blood vessel Doppler measurements. Results The MCA PSV MoM and fetal hematocrit MoM had a correlation coefficient of −0.43 (95% confidence interval −0.68 to 0.08; P =0.017). The sensitivity, specificity, positive predictive value, and negative predictive value were 68%, 57%, 83%, and 33%, respectively. The descending aorta PSV δ and fetal hematocrit δ had a correlation coefficient of −0.54 (95% confidence interval −0.75 to −0.23; P =0.001). An area under the curve of 0.80 (standard error 0.085; P =0.017) had 87% sensitivity and 57% specificity for diagnosing fetal anemia. Conclusion The descending aorta PSV could offer a useful diagnostic adjunct to MCA PSV after two intrauterine transfusions.